Pipe-coupling and check-valve



(No Model.)

W. T. MBSSINGER.

PIPE GOUPLING AND CHECK VALVE. No. 455,633. A y Patented July 7,1891.

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@d @Mej Z5 T against the interposed cylinder.

To a/ZZ whom, it muy concern:

UNIIED vSTATES PATENT Orricn.`

WILLIAM T. MESSINGER, OF BOSTON, ASSIGNOR TO GEORGE I). VILDES,

OF IPSlVIOIfI, MASSACHUSETTS.

PIPEiCOUPLING AND CHECK-VALVE.

SPECIFICATION forming part of Letters Patent N o. 5,633, dated July '7, 1891.

Application filed Aprill, 1891.

Beit known that I, WILLIAM T. MEssINeER,

i of Boston, county ot' Suffolk, State of Massachusetts, haveinvented an Improvement in Pipe-Couplings and Check-Valves, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the ing like parts.

This invention is embodied in apipe-coupling and checkvalve in which the checkvalve is contained in a removable cylinder interposed between the ends of two couplingpieces and inclosed within the coupling-nut, by which the said coupling-pieces are clamped drawings represent- In the device forming the subject of this invention the removable cylinder or rin g supports within it a piece containing the valveseat and guide for the valve.,:I The valveguide and seat-piece are shown'in one instance as screwed into the removable cylinder, and by having the valve-seat and guide formed in a single piece separate from the cylinder, as described, it is much more easily and perfectly `finished than when the valveseat and valve-stein guide are in separate pieces, which when put together constitute a removable chamber which incloses the valve. As shown in this instance, the valve proper is concave or cup shaped, and is provided with an axial stem for supporting and guiding it, while the seat-piece has Ya raised guide, in which the stem works and which is connected by arms with the annular valve-seat.

Figure l is a side elevation of a combined coupling and Valve embodying this invention. Fig. 2 is a longitudinal section thereof.

Figs. 3 and Il are a side elevation and plan view of the valve-seat and guide-piece attached. Fig. 5 is a side elevation of the removable cylinder; Fig. G, a side elevation of the valve proper, and Fig. 7 a sectional view showing a modified construction of the removable cylinder and co-operating parts.

The device forming the subject of this invention comprises two coupling pieces a ZJ, adapted to be connected with the ends of a pipe to be coupled together, as by the internal screw threads a2 b2. One of the said coupling-pieces is provided with a iiange or Serial No. 387,249. (No model.)

rect engagement with one another or against a simple interposed washer, causes the said coupling-pieces to be tightly pressed against the ends of an interposed cylinder d, (see Figs. 2 and 5,) which cylinder fits loosely i11- side the coupling-nut c, and, as shown in Fig. 2, engages at its ends with the coupling-pieces a b, so that when the coupling-nutis turned up tight the coupling-pieces are pressed tightly against the ends ofthe said cylinder d and make a tight joint therewith. Said cylinderis hollow and constitutes a support or holder for the valve-seat and guide-piece e, composed mainly of an annular base @2,'which constitutes the valve-seat proper or part against which of fluid through the cylinder and pipes connected therewith except in one direction. Said annular base e2 is open at its middle to permit the Huid to How when the valve is unseated, and has connected with-it by a number ot inclined arms c3 a guide-piece e4, having a guide-passage e5, in which the stem of the valve proper works. Said valve-guide and seat-piece are shown in Figs. 2 and 3 as externally threaded, so as to screw into a corresponding internal thread in its holding-cylinder cl, as shown in Fig. 2, and the piece e2 may either constitute the seat with which the valve' directly engages, or may be used to support a seat of softer and more yielding material, as illustrated at @20, Fig. 2, in which case `the soft seat is clamped between the annular base e2 and a suitable shoulder formed at the inside of the cylinder d. (see Figs. 2 and G) is shown as oup-shaped,so as to receive within it the arms e3 and guidepiece e, as shown in Fig. 2, said valve having the central stem f2, which works in the guide-opening c5, and which may be, if desired, acted upon by a light spring f3, (see Fig. 2,) interposed between theguide and a suitable nut or head f4, formed at the end of the said valve-stem or said spring, being otherwise engaged with the stem, so that it tends to hold the valve lightly pressed against its seat, except when the valve is lifted or un- The valve proper f 9o seated by the iioW of Huid through the valveseat toward the under surface of the valve. The coupling-pieces ca b are provided with cross-bars d4 b4, one of which serves as a stop to limit the movement of the valve away from its seat, or, in other words, to arrest the valve when opened by the ow of iiuid in a`position to afford a free passage for the iuid. By having the cross-bars on both pieces the proper one will serve as a stop when the valveseat-holding cylinder d is introduced in the position desired to properly control the iiuid in any given case. The inclined arms c3, that connect the valve-stem guide with the annular valve-seat, also tend to form a guide by engagement with the inner edge of the cupshaped valve as the latter approaches Aits seat, thus guiding the edge of the valve into proper position on the annular seat, in case the stem 2o f2 works somewhat loosely in its guide-passage. By having the seat portion and valvestern guide made in a single piece, which is separate and detachable from its supportingcylinder d, as shown, the seat and guide-surfaces can be made much more easily and with greater accuracy than if one of the said parts were made integral with the cylinder d and the other in a separate piece detachable from but connected with the said cylinder. The cylinder cl and in closed valve and its seat and guide-piece may be easily removed when required for repairs or for any other reason by simply unscrewing the coupling-nut c and slipping it back over the coupling-piece a, when the cylinder CZ can be readily moved sidewise from between t-he couplingpieces and again returned after the proper inspection or repairs have been made. As the only parts that require accurate fitting relative to one another for the operation of the instrument are formed in the piece e, that is separable from the cylinder d, it is obvious that if said working parts-such, for example, as the seat-surface or the valve-stein guide should become damaged the instrumentmay be repaired by merely inserting a new seat and guide-piece in the same holding-cylinder that had been used before, as there is no necessity for accurate litting between the cylinder and guide-piece, as would be required if the cylinder itself had either the valve-stein guide or the valve-seat made integral with it, while the other of the said elements was made in the detachable piece. If desired, one of the coupling -pieces may engage withv the valve-seat and guide-piece c, instead of with the adjacent end of the chamber d, as shown in Fig. 7, in which the detachable guide and seat piece is shown as engaged with its holding-cylinder by a tapering surface instead of by screw-threads.

I claiml l. The combination of a pair of couplingpieces and a co-operating coupling-nut with a removable cylinder contained Within said coupling nut and between said couplingpieces, a guide and seat piece having a valveseat and valve-guide integrally formed therein, and a valve (3o-operating with said valveguide and seat-piece, which latter is detachably .connected with the said removable cylinder, substantially as and for the purpose described.

2. The combination of a pair of couplingpieces and co-operating coupling-nut with a removable hollow cylinder contained between said coupling-pieces and within said couplingnut, a valve-seat and guide-piece separable from but engaged with said cylinder and comprising an annular seat portion, inclined guide-arms, and a guide-piece having a guidepassage, an d a cup-shaped valve having a stem working in said guide-passage, 'substantially 1 as described. v

3. The combination of a pair of couplingpieces, one provided with an internal crossbar, with a coupling-n ut and a removable cylinder contained between said coupling-pieces and within said coupling-nut, the valve-guide and seat piece detachable from but supported in said cylinder, and a valve co-operating therewith, as described, the said crossbar of the said coupling-piece constituting a stop to limit the movement of the valve from its seat, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM T. MESSINGER.

Witnesses:

J oHN H. MonisoN, JAS. J. MALoNEY. 

